Set a hard dollar ceiling per key, team, and org. A runaway agent or a traffic spike can never turn into a surprise bill — requests stop at the limit, not after the money is gone.
"The AI bill went up" is useless without attribution. Here is how request tags let you slice LLM spend by team, customer, feature, and environment on a gateway — no per-call bookkeeping in your app.
If you sell an AI product, you need to know what each customer costs to serve. Here is how request tags, team scoping, and exact cost tracking turn one gateway bill into per-customer economics.